Pemko manufactures thresholds in several materials to meet customer needs. Extruded Aluminum thresholds are manufactured of tempered aluminum, 6063-T6. Architectural bronze/brass thresholds are manufactured of CDA alloy C38500. Roll Formed Aluminum Plates are manufactured from 5052-H32 Aluminum. Eco-V thresholds are manufactured using a bio-based, phthalate-free material with no heavy metals. Thresholds are available in numerous configurations and finishes for most applications.